Answer:
A) He wants to monitor the emotional temperature.
Step-by-step explanation:
Emotional temperature refers to how much a person is being controlled by his/her emotions, or we could also imply how much a person is losing control due to his/her emotions.
Modern psychology has argued that a certain amount of emotions does not affect our rationality nor it blinds us from evaluating the consequences of our actions.
This is why the term emotional temperature is starting to be used by psychologists. Positive emotional temperature refers to a positive influence of your emotions in your decision making processes, while a negative emotional temperature is just the opposite. As the stakes grow, emotional temperature also changes, and might change from positive to negative depending on the circumstances.
In this case, Toby felt that Dante was getting upset, so before his emotional temperature turned negative and the possibility of a deal is lost, he decided to take a break. Next day he will again try to engage in negotiations and see how Dante responds.